4.1 Magnitude Earthquake Strikes Sonoma County on Monday Morning

HEALDSBURG, Calif. — A magnitude 4.1 earthquake shook northern Sonoma County on Monday morning, according to the U.S. Geological Survey (USGS). The quake struck at 7:08 a.m. and was centered about 3.3 miles southwest of Cobb in Lake County, a known seismically active area.

The epicenter was located roughly 13 miles north-northeast of Healdsburg and about 17 miles north of Windsor. The quake occurred at a shallow depth of 1.2 miles, which can intensify the shaking felt in nearby areas. Reports indicated that moderate shaking was experienced near the epicenter, with lighter shaking felt in Santa Rosa and as far north as Clearlake.

Just a minute later, at 7:09 a.m., an aftershock measuring 2.8 on the Richter scale struck the same area. Residents reported feeling the earthquake not only in Sonoma County but also as far south as San Francisco.

Despite the intensity of the tremors, there were no immediate reports of damage or injuries. The USGS has urged residents to stay prepared for potential aftershocks and to review earthquake readiness plans.

The Geysers, the location of the main quake, is known as the world’s largest geothermal field, hosting 18 geothermal power plants.

As authorities continue to monitor the situation, they remind the public to report any tremors felt through their website or app.